<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title></title>
    <script>
    function show1(...args){
      show2(...args);
    }

    function show2(a, b){
      alert(a+','+b);
    }

    show1(12, 5);
    </script>
  </head>
  <body>
  </body>
</html>
